I have an issue with our Sharepoint 2013 environment where one site gives access denied errors. I use an account which is member of the site admins, I can see the previously created lists etc but if I try to go to e.g. the Site Settings page I get an "access denied" error.
I tested with SP DEsigner what that would do but that basically does the same. I can create and delete a new list but I can't create any new pages.
E.g. I can't acces http://site/_layouts/settings.aspx
I even have run a powershell script to reset all permissions from the site's top level down.
Is this a permissions problem within the site or is this a folder permission (IIS??) of some sort?
If I create a complete new site in Sharepoint the problem does not occur.